ETS052 Computer Communication

2012/2013 Ht1

Messages: 

The next exam is on January 9, 14-19 in Victoria Stadium. You will need to register for the exam. The link for the registration will be posted on the EIT home page soon.

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The results for the exam have been registered in Ladok!

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Final exam 121023 with preliminary Solutions. If you find any errors, please email me.

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We have had some confusion regarding the network problems on the old exams. Here are some clarifications:

1. A host that is connected to a network is assumed to know four essential things:
(a) Its own IP address
(b) The IP address to its closest DNS server
(c) The IP address to its default gateway (router)
(d) Its subnet mask

2. When a host wants to send an IP packet with destination address belonging to another network, it sends the IP packet to its default gateway. The host itself can discover that the IP address belongs to another network by using its subnet mask.

The books and the lectures have not been clear on this topic, sorry for this.

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Results of Midterm exam in ETS052 Computer Communication 2012-10-01

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Forouzan describes Selective Repeat ARQ differently in 4th and 5th edition. We will follow the lecture slides. The important thing is that there are protocol rules for resending specific frames that the receiver miss. Therefore NAKs should be used, see here.    

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You can find a preliminary course program here.

Reading directives can be found on the Lecture page and the Course description page.

If you have any questions, please email Maria Kihl (main teacher) or Marianne Greiff Svensson (course secretary).